package com.da.netty.groupchat;

import io.netty.bootstrap.ServerBootstrap;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.ChannelOption;
import io.netty.channel.ChannelPipeline;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioServerSocketChannel;
import io.netty.handler.codec.string.StringDecoder;
import io.netty.handler.codec.string.StringEncoder;

public class GroupChatServer {
    //监听端口
    private int port;

    public GroupChatServer(int port) {
        this.port = port;
    }

    //编写run方法，处理客户端的请求
    public void run() throws Exception {
        //创建两个线程组
        EventLoopGroup bossGroup = new NioEventLoopGroup(1);
        EventLoopGroup workerGroup = new NioEventLoopGroup();

        try {
            ServerBootstrap serverBootstrap = new ServerBootstrap();

            serverBootstrap.group(bossGroup, workerGroup)
                .channel(NioServerSocketChannel.class)
                .option(ChannelOption.SO_BACKLOG, 128)
                .childOption(ChannelOption.SO_KEEPALIVE, true)
                .childHandler(new ChannelInitializer<SocketChannel>() {
                    @Override
                    protected void initChannel(SocketChannel ch) throws Exception {
                        //获取到pipeline
                        ChannelPipeline pipeline = ch.pipeline();
                        //向pipeline加入解码器
                        pipeline.addLast("decoder", new StringDecoder());
                        //向pipeline加入编码器
                        pipeline.addLast("encoder", new StringEncoder());
                        //加入自己的业务处理handler
                        pipeline.addLast(new GroupChatServerHandler());
                    }
                });

            System.out.println("netty 服务器启动");
            ChannelFuture cf = serverBootstrap.bind(port).sync();
            cf.channel().closeFuture().sync();
        } finally {
            bossGroup.shutdownGracefully();
            workerGroup.shutdownGracefully();
        }
    }

    public static void main(String[] args) throws Exception {
        new GroupChatServer(7000).run();
    }
}
